package com.example.pda.net;

import android.text.TextUtils;

import com.example.pda.common.SharedUtils;

import java.io.EOFException;
import java.io.IOException;
import java.nio.charset.Charset;
import java.nio.charset.IllegalCharsetNameException;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.TimeUnit;

import androidx.annotation.NonNull;
import okhttp3.Connection;
import okhttp3.Headers;
import okhttp3.Interceptor;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Protocol;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;
import okhttp3.ResponseBody;
import okhttp3.internal.http.HttpHeaders;
import okhttp3.internal.platform.Platform;
import okio.Buffer;
import okio.BufferedSource;
import retrofit2.Retrofit;
import retrofit2.adapter.rxjava2.RxJava2CallAdapterFactory;
import retrofit2.converter.gson.GsonConverterFactory;
import retrofit2.converter.scalars.ScalarsConverterFactory;
import retrofit2.converter.simplexml.SimpleXmlConverterFactory;

import static okhttp3.internal.platform.Platform.INFO;

public class HttpManager {
    private static HttpManager mManger;
    private Retrofit mRetrofit;
    private Api api;

    public static String token = "";

    public static HttpManager getInstance() {
        if (mManger == null) {
            synchronized (HttpManager.class) {
                if (mManger == null) {
                    mManger = new HttpManager();
                }
            }
        }
        return mManger;
    }

    public void reset(String http, String httpPort) {
        mManger = null;
        mRetrofit = null;
    }

    private HttpManager() {
        String http = SharedUtils.getIP();
        String httpPort = SharedUtils.getPort();
        if (!TextUtils.isEmpty(http) && !TextUtils.isEmpty(httpPort)) {
            init("http://" + http + ":" + httpPort + "/");
        } else {
//            init("http://40g763n190.qicp.vip:41136/");
            init("http://2bi6st.natappfree.cc:80/");
        }
    }

    public void init(String baseUrl) {
        // 初始化OKHTTP
        LoggingInterceptor loggingInterceptor = new LoggingInterceptor();
        loggingInterceptor.setLevel(LoggingInterceptor.Level.BODY);
        OkHttpClient.Builder okHttpBuilder = new OkHttpClient.Builder().addInterceptor(chain -> {
            Request request = chain.request();
            Request.Builder builder = request.newBuilder();
            Request build = builder
                    .addHeader("token", token)
                    .method(request.method(), request.body())
                    .build();
            return chain.proceed(build);
        });
        OkHttpClient build = okHttpBuilder.connectTimeout(60, TimeUnit.SECONDS)
                .addInterceptor(loggingInterceptor)
                .readTimeout(60, TimeUnit.SECONDS)
                .writeTimeout(60, TimeUnit.SECONDS)
                .retryOnConnectionFailure(false)
                .build();
        // 初始化Retrofit
        mRetrofit = new Retrofit.Builder()
                .client(build)
                .baseUrl(baseUrl)
                //设置数据解析器
                .addConverterFactory(GsonConverterFactory.create())
                // 针对rxjava2.x
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .addConverterFactory(ScalarsConverterFactory.create())
                .addConverterFactory(SimpleXmlConverterFactory.create())
                .build();

        api = null;
    }

    public Api getApi() {
        if (api == null) {
            api = mRetrofit.create(Api.class);
        }
        return api;
    }

    public static class LoggingInterceptor implements Interceptor {
        private static final Charset UTF8 = StandardCharsets.UTF_8;

        public enum Level {
            /**
             * No logs.
             */
            NONE,
            /**
             * Logs request and response lines.
             *
             * <p>Example:
             * <pre>{@code
             * --> POST /greeting http/1.1 (3-byte body)
             *
             * <-- 200 OK (22ms, 6-byte body)
             * }</pre>
             */
            BASIC,
            /**
             * Logs request and response lines and their respective headers.
             *
             * <p>Example:
             * <pre>{@code
             * --> POST /greeting http/1.1
             * Host: example.com
             * Content-Type: plain/text
             * Content-Length: 3
             * --> END POST
             *
             * <-- 200 OK (22ms)
             * Content-Type: plain/text
             * Content-Length: 6
             * <-- END HTTP
             * }</pre>
             */
            HEADERS,
            /**
             * Logs request and response lines and their respective headers and bodies (if present).
             *
             * <p>Example:
             * <pre>{@code
             * --> POST /greeting http/1.1
             * Host: example.com
             * Content-Type: plain/text
             * Content-Length: 3
             *
             * Hi?
             * --> END POST
             *
             * <-- 200 OK (22ms)
             * Content-Type: plain/text
             * Content-Length: 6
             *
             * Hello!
             * <-- END HTTP
             * }</pre>
             */
            BODY
        }

        public interface Logger {
            void log(String message);

            /**
             * A {@link Logger} defaults output appropriate for the current platform.
             */
            Logger DEFAULT = message -> Platform.get().log(INFO, message, null);
        }

        public LoggingInterceptor() {
            this(Logger.DEFAULT);
        }

        public LoggingInterceptor(Logger logger) {
            this.logger = logger;
        }

        private final Logger logger;

        private volatile Level level = Level.NONE;

        /**
         * Change the level at which this interceptor logs.
         */
        public void setLevel(Level level) {
            if (level == null)
                throw new NullPointerException("level == null. Use Level.NONE instead.");
            this.level = level;
        }

        @NonNull
        @Override
        public Response intercept(Chain chain) throws IOException {
            Level level = this.level;

            Request request = chain.request();
            if (level == Level.NONE) {
                return chain.proceed(request);
            }

            boolean logBody = level == Level.BODY;
            boolean logHeaders = logBody || level == Level.HEADERS;

            RequestBody requestBody = request.body();
            boolean hasRequestBody = requestBody != null;

            Connection connection = chain.connection();
            Protocol protocol = connection != null ? connection.protocol() : Protocol.HTTP_1_1;
            String requestStartMessage = "--> " + request.method() + ' ' + request.url() + ' ' + protocol;
            if (!logHeaders && hasRequestBody) {
                requestStartMessage += " (" + requestBody.contentLength() + "-byte body)";
            }
            logger.log(requestStartMessage);

            if (logHeaders) {
                if (hasRequestBody) {
                    // Request body headers are only present when installed as a network interceptor. Force
                    // them to be included (when available) so there values are known.
                    if (requestBody.contentType() != null) {
                        logger.log("Content-Type: " + requestBody.contentType());
                    }
                    if (requestBody.contentLength() != -1) {
                        logger.log("Content-Length: " + requestBody.contentLength());
                    }
                }

                Headers headers = request.headers();
                for (int i = 0, count = headers.size(); i < count; i++) {
                    String name = headers.name(i);
                    // Skip headers from the request body as they are explicitly logged above.
                    if (!"Content-Type".equalsIgnoreCase(name) && !"Content-Length".equalsIgnoreCase(name)) {
                        logger.log(name + ": " + headers.value(i));
                    }
                }

                if (!logBody || !hasRequestBody) {
                    logger.log("--> END " + request.method());
                } else if (bodyEncoded(request.headers())) {
                    logger.log("--> END " + request.method() + " (encoded body omitted)");
                } else {
                    Buffer buffer = new Buffer();
                    requestBody.writeTo(buffer);

                    Charset charset = UTF8;
                    MediaType contentType = requestBody.contentType();
                    if (contentType != null) {
                        charset = contentType.charset(UTF8);
                    }

                    logger.log("");
                    if (isPlaintext(buffer)) {
//                        logger.log(Utils.toURLDecoder(buffer.readString(charset)));
                        assert charset != null;
                        logger.log(buffer.readString(charset));
                        logger.log("--> END " + request.method()
                                + " (" + requestBody.contentLength() + "-byte body)");
                    } else {
                        logger.log("--> END " + request.method() + " (binary "
                                + requestBody.contentLength() + "-byte body omitted)");
                    }
                }
            }

            long startNs = System.nanoTime();
            Response response;
            try {
                response = chain.proceed(request);
            } catch (Exception e) {
                logger.log("<-- HTTP FAILED: " + e);
                throw e;
            }
            long tookMs = TimeUnit.NANOSECONDS.toMillis(System.nanoTime() - startNs);

            ResponseBody responseBody = response.body();
            assert responseBody != null;
            long contentLength = responseBody.contentLength();
            String bodySize = contentLength != -1 ? contentLength + "-byte" : "unknown-length";
            logger.log("<-- " + response.code() + ' ' + response.message() + ' '
                    + response.request().url() + " (" + tookMs + "ms" + (!logHeaders ? ", "
                    + bodySize + " body" : "") + ')');

            if (logHeaders) {
                Headers headers = response.headers();
                for (int i = 0, count = headers.size(); i < count; i++) {
                    logger.log(headers.name(i) + ": " + headers.value(i));
                }

                if (!logBody || !HttpHeaders.hasBody(response)) {
                    logger.log("<-- END HTTP");
                } else if (bodyEncoded(response.headers())) {
                    logger.log("<-- END HTTP (encoded body omitted)");
                } else {
                    BufferedSource source = responseBody.source();
                    source.request(Long.MAX_VALUE); // Buffer the entire body.
                    Buffer buffer = source.buffer();

                    Charset charset = UTF8;
                    MediaType contentType = responseBody.contentType();
                    if (contentType != null) {
                        charset = contentType.charset(UTF8);
                    }

                    if (!isPlaintext(buffer)) {
                        logger.log("");
                        logger.log("<-- END HTTP (binary " + buffer.size() + "-byte body omitted)");
                        return response;
                    }

                    if (contentLength != 0) {
                        logger.log("");
                        assert charset != null;
                        logger.log(buffer.clone().readString(charset));
                    }

                    logger.log("<-- END HTTP (" + buffer.size() + "-byte body)");
                }
            }

            return response;
        }

        /**
         * Returns true if the body in question probably contains human readable text. Uses a small sample
         * of code points to detect unicode control characters commonly used in binary file signatures.
         */
        static boolean isPlaintext(Buffer buffer) {
            try {
                Buffer prefix = new Buffer();
                long byteCount = buffer.size() < 64 ? buffer.size() : 64;
                buffer.copyTo(prefix, 0, byteCount);
                for (int i = 0; i < 16; i++) {
                    if (prefix.exhausted()) {
                        break;
                    }
                    int codePoint = prefix.readUtf8CodePoint();
                    if (Character.isISOControl(codePoint) && !Character.isWhitespace(codePoint)) {
                        return false;
                    }
                }
                return true;
            } catch (EOFException e) {
                return false; // Truncated UTF-8 sequence.
            }
        }

        private boolean bodyEncoded(Headers headers) {
            String contentEncoding = headers.get("Content-Encoding");
            return contentEncoding != null && !contentEncoding.equalsIgnoreCase("identity");
        }
    }

}
